Fix INFO.yaml files

Proper syntax for INFO.yaml requires the first
line to be "---" which was previously removed.
Re-adding this missing line.

Issue-ID: CIMAN-387
Signed-off-by: Jessica Wagantall <jwagantall@linuxfoundation.org>
Change-Id: I015dcfcf1eba867db0a3846314595baf66379c6c
diff --git a/INFO.yaml b/INFO.yaml
index 8fe223b..466db36 100644
--- a/INFO.yaml
+++ b/INFO.yaml
@@ -1,3 +1,4 @@
+---
 project: 'dcaegen2-collectors'
 project_creation_date: '2017-06-28'
 project_category: ''